Some people believe that allowing children to make their own choices on everyday matters (such as food, clothes and entertainment) is likely to result in a society of individuals who only think about their own wishes. Other people believe that it is important for children to make decisions about matters that affect them.

In a number of countries, some people think it is necessary to spend large sums of money on constructing new railway lines for very fast trains between cities. Others believe the money should be spent on improving existing public transport.

Some people believe that it is good to share as much information as possible in scientific research, business and the academic world. Others believe that some information is too important or too valuable to be shared freely.